1. Department of Veterans Affairs, Center of Innovation for Complex Chronic Healthcare, Edward Hines Jr VA Hospital, Hines, Illinois, USA
2. Department of Preventive Medicine and Center for Healthcare Studies, Northwestern University, Chicago, Illinois, USA
3. Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois, USA
4. Cincinnati VA Medical Center and University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
5. VA Puget Sound Health Care System, Seattle, Washington, USA
6. Department of Rehabilitation Medicine, University of Washington, Seattle, Washington, USA
7. Department of Pediatrics and Center for Community Health, Northwestern University, Chicago, Illinois, USA
8. Department of Veterans Affairs, Research Service, Edward Hines Jr VA Hospital, Hines, Illinois, USA